Fig. 1

Elevated proportions of CD4+CD25-Foxp3+ T cells and CD4⁺CD25⁺Foxp3⁺ Treg cells in RA: a representative flow cytometry plots. b The proportion of CD4⁺CD25⁻Foxp3⁺ T cells in the PB of HCs, total untreated RA patients, inactive RA patients, and active RA patients. c The proportion of CD4⁺CD25⁺Foxp3⁺ Treg cells in the PB of HCs, total untreated RA patients, inactive RA patients and active RA patients. *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001. HCs, healthy controls; RA, rheumatoid arthritis.